[Libreoffice] Compiling question by a complete beginner

Hi, I'm a complete beginner in LibreOffice development and at the compiling
step now. I tried instructions here:
http://wiki.documentfoundation.org/Development/Native_Build But compilation
failed while building the moz module. I tried instructions here:
https://www.libreoffice.org/bugzilla/show_bug.cgi?id=39852 but the result
is the same.

Then, i found this blog post and restarted compilation from the beginning:
http://www.vogella.de/blog/2011/02/10/how-to-compile-libreoffice/ I got an
error about helpcontent2.

Error message:
-----------------------------------------------------------------------------------------------------------------------------------------------------------
ERROR: error 65280 occurred while making
/home/baris/libo/helpcontent2/source/auxiliary

 it seems that the error is inside 'helpcontent2', please re-run build
 inside this module to isolate the error and/or test your fix:
-----------------------------------------------------------------------

rm -Rf /home/baris/libo/helpcontent2/unxlngi6.pro # optional module 'clean'
/bin/bash
cd /home/baris/libo
source ./Env.Host.sh
cd helpcontent2
build

when the problem is isolated and fixed exit and re-run 'make' from the
top-level
-----------------------------------------------------------------------------------------------------------------------------------------------------------
I tried ./autogen.sh --with-languages and ./download and the commands above
but, result is negative. I have directories such as artwork, base, calc in
clone directory but i have no l10n directory there.

By the way, second way of compilation took 20 hours until the error. Isn't
this a bit long? The first one took only 8-9 hours.

I'm using Ubuntu 11.04. Do you have any suggestions? Thanks, in advance.